instrumentation for nuclear applications

www.delta-controls.com

Instrumentation for Nuclear Applications


Instrumentation for Nuclear Applications

Chrisb

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www.delta-mobrey.com

Nuclear Instrumentation Overview

Delta Mobrey has been designing and manufacturing instrumentation for the power and process industries for over 65 years and has served the nuclear industry in the UK since the first nuclear reactors were designed and built over 55 years ago.

A specialist in pressure, temperature and flow instrumentation, Delta has provided a range of generic and bespoke instruments to the industry across all the UK Nuclear Fleet including Magnox, AGR, PWR and PFR.

Delta has also worked extensively on decommissioning projects, fuel processing and reprocessing, working with Sellafield (formerly BNFL), Westinghouse and the UKAEA.

Available instruments include products that meet the RCC-E and IEEE Class 1E requirements for seismic and radiation endurance. Tests details are given in the Testing Summary Table opposite. The IEEE tests are equivalent to RCC-E level K2. Many products also meet SIL 2 requirements and numerous international Hazardous Area approvals.

Products are used within containment, in the nuclear island, in safety shut down applications, critical areas of process control, alarm and general process monitoring.

Delta has worked in the worldwide nuclear industry for over 40 years with projects in China, Sweden, Finland, South Korea, the USA, Canada, India and Spain on PWR, BWR and CANDU reactor types.

ConnectorsA number of different connectorshave been tested on our productsincluding the Harting 7D, theSouriau 8N45S and the EGSQuick Disconnect Connector(QDC)

MicroswitchesDelta Mobrey's own design of Hermetically Sealed Microswitch has been tested and passed the DBE LOCA event after thermal and radiation aging.

WiresAll wires used are Habia withradiation resistant sleeving

HousingsDelta’s all stainless steelconstruction provides the highestquality enclosures for all theNuclear Qualified products.

View inside a NuclearSwitch showing the

microswitch, mechanism,wires and connector


Nuclear Instrumentation Overview

Nuclear 200 SeriesPressure Switch

Nuclear S20 SeriesPressure Switch

Nuclear 700 SeriesTemperature Switch

Nuclear 300 SeriesDifferential Pressure Switch

Fast ResponseTemperature Switch

Air FlowTransmitter / Switch

BaselineFunctionalTests

ThermalAging Tests

RadiationAging Tests

MechanicalCycling

Seismic LOCA/HELB

Nuclear Switch Test Programme

Nuclear Product QualificationInstrumentation used in the Nuclear Island of a Nuclear Power Plant arerequired to survive seismic and radiation exposure of different severitylevels depending on the location on the plant and the application.

Thermal AgingThe switches were thermally aged at 122°C for 1053hours to simulate an end-of-life condition after 20 years.This accelerated aging was performed according to the Arrhenius model and based on the lowest activation en-ergy of the non-metallic materials used in construction.

Radiation AgingA number of the switches were exposed to a Total Integrated Dose (TID) of 17.82MRads at a rate of0.25MRads/hr using Cobalt 60 gamma rays to achieve the end-of-life condition expected after being exposed toboth normal and accident conditions. Other switches were exposed to a TID of 27.5MRads.

Baseline Functional TestingThese tests, designed to establish baseline conditionsprior to testing, included: Contact Rating Insulation Resistance Operability

Delta has subjected various instruments to testingregimes that meet the requirements of IEEEStandard 323-1974, IEEE Standard 344-1975 andthe RCC-E Code (Design and Construction Rulesfor Electrical Equipment of Nuclear Islands) .

This qualification involved the accelerated ageingof the products (thermal aging, radiation aging,mechanical cycling) before subjecting them toSSE/DBE seismic profiles and finally aLOCA/HELB accident simulation. The product’sperformance was checked before and after eachtest and compared with the baseline functionaltests conducted at the beginning of the pro-gramme.

Delta Switches undergoing radiation testing

Mechanical CyclingThe Switches were cycled a minimum of 1000 times, actuating the switches for 15 seconds then de-actuating them for 15 seconds, while monitoring and recording the current across a precision resistor throughout the test to ensure correct operation. The purpose of this was to mechanically age the product by simulating the typical number of actuations over a 20 year period for a specific alarm application.



Nuclear Switch Test Programme

Seismic QualificationIn separate test programmes Delta’s products were seismically tested using the random multi-frequency (RMF)test requirements of Standard IEEE 344-1975/1987 and were subjected to tri-axial RMF test levels as shownbelow, and also to the spectra as defined in the RCC-E Code

Delta Switches being seismically testedat the SOPEMEA test facility in France

to the RCC-E seismic spectra

LOCA/HELB Accident SimulationFollowing the aging programme and the seismic tests the products were subjected to a HELB (High Energy LineBreak) / LOCA (Loss of Coolant Accident) simulation. This exposed the products to 173°C superheated steamfor 3 hours at 550KPa abs, and 160°C for 6 hours and 24 hours at 120°C with saturated steam.

Delta Switches mountedin LOCA chamber

0

2

4

6

8

10

12

1 10 100

g

Hz

Seismic SSE Test Levels (OBE 70% SSE)

SL1 SL2 SL3 SL4 SL5 SL6

0

20

40

60

80

100

120

140

160

180

200

0 10000 20000 30000 40000 50000 60000 70000 80000 90000

Tem

p, D

eg C

Seconds

LOCA/HELB Profile with IEEE 323 8°C Margin


Qualified Harting 7D, EGS QDC and Souriau connectors available

Delta Mobrey Microswitch tested to meet requirements of RCC-E K2

Best in class accuracy of ± 0.5%

FEP and EPDM seals and gaskets suitable for exposure to radiation

Weatherproof and Flameproof models Ex d IIC - ATEX

Ranges available up to 75 Bar (1,000 psi)

Precision stainless steel mechanism for arduous atmospheres andhigh humidity

Set point adjustable over whole range against calibrated scale with tamperproof adjustment

Precise and accurate operation guaranteed by use of hydraulic formed bellows or capsule stack

Models for fixed and adjustable switching differential

Safety vented or blow out device as standard

200 Series

Nuclear Grade Pressure Switch

Dimensions



Delta Controls Microswitch tested to meet requirements of RCC-E K2



Weatherproof and Flameproof models Ex d IIC - ATEX

Ranges available up to 75 Bar (1,000 psi)

Precision stainless steel mechanism for arduous atmospheres and high humidity


Precise and accurate operation guaranteed by use of hydraulic formed bellows or capsule stack



200 Series

Nuclear Grade Pressure Switch

Dimensions



Delta Mobrey Hermetic Microswitch tested to meet requirements

of RCC-E K2

Best in class accuracy of ± 1%


Weatherproof and Flameproof models EEx d IIC - ATEX

Static pressure up to 250 bar (3500 psi)





300 Series

Nuclear Grade Differential Pressure Switch

Dimensions



Delta Controls Hermetic Microswitch tested to meet requirements

of RCC-E K2

Best in class accuracy of ± 1%



Static pressure up to 250 bar (3500 psi)





300 Series

Nuclear Grade Differential Pressure Switch

Dimensions



Delta Controls Microswitch tested to meet requirements of RCC-E K2




Set point ranges up to 300°C (580°F)

Rigid and semi-rigid thermal system options





700 Series

Nuclear Grade Temperature Switch

Dimensions



Delta Mobrey Microswitch tested to meet requirements of RCC-E K2




Set point ranges up to 300°C (580°F)

Rigid and semi-rigid thermal system options





700 Series

Nuclear Grade Temperature Switch

Dimensions


Fast reaction air temperature switches are used throughout a nuclear power

plant to detect sudden rises in ambient temperature. Delta has optimised the

design of this product to react very quickly to temperature change and can

provide fast early warning of possible problems in the plant.

This model consists of a sensing element manufactured from thin walled cop-

per tube filled with a volatile fluid. By keeping the length to diameter ratio

high, the surface area of the sensing element is maximised achieving a fast-

er response to temperature changes than more traditional types.

720 Series

Fast Response Temperature Switch

Dimensions

The element is coiled into a helix and mechanically supported and protected by a shroud without impairing

sensitivity to changes in ambient temperature.

Response times will vary depending on the movement of the surrounding atmosphere. Depending on the

location, air movement and ambient temperature, response times can be expected within seconds


Fast reaction air temperature switches are used throughout a nuclear power

plant to detect sudden rises in ambient temperature. Delta has optimised the

design of this product to react very quickly to temperature change and can

provide fast early warning of possible problems in the plant.

This model consists of a sensing element manufactured from thin walled cop-

per tube filled with a volatile fluid. By keeping the length to diameter ratio

high, the surface area of the sensing element is maximised achieving a fast-

er response to temperature changes than more traditional types.

720 Series

Fast Response Temperature Switch

Dimensions

The element is coiled into a helix and mechanically supported and protected by a shroud without impairing

sensitivity to changes in ambient temperature.

Response times will vary depending on the movement of the surrounding atmosphere. Depending on the

location, air movement and ambient temperature, response times can be expected within seconds


The 588 Series of Flow Transmitters and Switches have been used in a variety of applications

in the nuclear industry including HVAC systems and other air flow ducting where positive

measurement of Flow is critical for plant and personnel safety.

The latest variant of the Flow Transmitter has an integrated switch for simple

alarm applications.

The Transmitter is also under assessment to SIL 1 levels under

the EMPHASIS assessment process.

Flow rates from 0.8 m/s and up to 38.5 m/s

Small bore diameter flow transmitters are also available

588 Series

Air Flow Transmitter / Switch

Dimensions




measurement of Flow is critical for plant and personnel safety.

The latest variant of the Flow Transmitter has an integrated switch for simple

alarm applications.

The Transmitter is also under assessment to SIL 1 levels under

the EMPHASIS assessment process.



588 Series

Air Flow Transmitter / Switch

Dimensions

588 Series – EMPHASIS Assessed – Smart Instrument



measurement of Flow is critical for plant and personnel safety. The 588 has also

undergone EMPHASIS Assessment for use in the UK Nuclear Industry.

The latest variant of the Flow Transmitter has an integrated

switch for simple alarm applications.

The Transmitter is SIL 1 Level certified.




Delta Controls is one of the leading companies worldwide for the design and manufacture of robust,reliable and competitively priced industrial and high performance transmitters and switches - allinternationally approved for use in hazardous areas for control, safety alarm and shutdown applications.

Pressure Switches

Utilising simple design principles and high quality engineering, more than 1 million different temperature, pressuredifferential pressure and flow switches have been supplied to customers worldwide.

Our customers can depend on the technical knowledge and expertise of our engineers to understand theirapplication requirements and recommend cost effective and practical switching solutions.

Based on proven technology our range of products is ideally suited for a broad range of applications including:

Temperature Solutions

Delta Controls offers a comprehensive range of quality assured temperaturemeasurement devices that meet the highest recognised standards across manyindustries. Rugged, reliable and accurate, the temperature product range includes:Analogue and digital transmitters inc HART Switches Sensors Thermowells Thermopockets RTD’s Indicators

Transmitters

Delta Controls’ analogue and digital pressure transmitters arerepeatedly specified because of their compact size, ruggeddesign and high specification. The range includes Absolute,Differential and Gauge designs with analogue or digital outputs.

Turbines and Compressors Feed and cooling water systems Condensate plant Pumping sets Valves and actuators Fire Protection systems Safety shutdown systems Boron metering HVAC and air cooling systems

Commercial Grade Instrumentation

Delta Mobrey is one of the leading companies worldwide for the design and manufacture of robust, reliable and competitively priced industrial and high performance transmitters and switches - all internationally approved for use in hazardous areas for control, safety alarm and shutdown applications. Delta Mobrey is also now the supplier of all Mobrey and KDG products, complementing the range with level measurement and nuclear qualified transmitters.

Instrumentation for the Power Industry

The power generation industry is changing rapidly, driven by growing demand, and increasing economic and environmental pressures. Choosing the right level measurement instrumentation not only helps keep your powerplant and personnel safe, but also increases operational efficiency.

Turbine water ingress prevention (TWIP) Ultimate protection of plant and increased personnel safety.

Mobrey Hydratect Water Detection System

De-aerators Ensure continuous feedwater to boiler with accurate level monitoring and reliable high/level alarms.

Mobrey Hydrastep Water/Steam Monitoring System Mobrey Magnetic Float Switches

Auxiliary plant processes Increased safety and efficiency with flexible, reliable level monitoring and control of tanks and sumps.

Steam drum Exceptional protection against costly and potentially disastrous low water levels.

Mobrey Hydrastep Water/Steam Monitoring System

Condensers Ensure continuous feedwater to boiler feed pump with accurate level monitoring and control.

Condensate pots Eliminate false trips with reliable detection of steam/water.

Mobrey Hydratect Water Detection System Mobrey Magnetic Float Switches

Feedwater heaters Prevent dangerous flood or low condensate level conditions and increase efficiency with reliable high/low level alarms.

Level Measurement

Ultrasonic Level Measurement

LK Hydrastep Electrodes

Vibrating RodLevel Measurement


About Delta Controls

Delta Controls has built a global reputation over 65 years for its expertise in the design and manufactureof reliable, high quality instrumentation for the power and process industries. Delta offers bothcustomised and standard solutions for process monitoring, alarm and shutdown applications, backed bylocal support from a worldwide network of carefully selected, professional and fully trained representatives.

Quality is a cornerstone of the company's success. This is recognised by industry and international approvals that

cover every aspect of Delta Controls' manufacturing, test and product portfolio.

Service and Support

Delta Mobrey is totally committed to delivering thebest possible customer service and technical supportreducing the lifetime cost of ownership whileproviding long term security - for one-off engineeringspecials through to large volume, more standardrequirements.

To add value for each customer, a flexible responsiveapproach to meeting individual instrumentationrequirements has been put in place. Delta

Mobrey's support infrastructure includes:

Technical advice Spare parts Recalibration Tailored accessory packages Installation support Operations and maintenance assistance Comprehensive documentation Extended warranty Local support

Delta Controls LtdRiverside Business Park, Dogflud Way, Farnham, GU9 7SS, UK

T +44 (0) 1252 729140 F +44 (0) 1252 729168 E [email protected]

Special Engineering

In addition to offering over 1 million product variants,

Delta Mobrey can also provide custom engineered

solutions to meet your exact requirements. The

complexity of special engineering can vary from a

simple change in process connection to a completely

redesigned product to meet specific performance

criteria.

Special engineered DP switchincorporating chemical seals withflushing ports and small deadband for use in Nuclear Power Plant






Service and Support

Delta Controls is totally committed to delivering thebest possible customer service and technical supportreducing the lifetime cost of ownership whileproviding long term security - for one-off engineeringspecials through to large volume, more standardrequirements.

To add value for each customer, a flexible responsiveapproach to meeting individual instrumentationrequirements has been put in place. Delta Controls'support infrastructure includes:


Delta Mobrey LtdRiverside Business Park, Dogflud Way, Farnham, GU9 7SS, UK(0) 1252 729140 F +44 (0) 1252 729168 E [email protected]

Special Engineering


Delta Controls can also provide custom engineered





criteria.


T +44






Service and Support

Delta Controls is totally committed to delivering thebest possible customer service and technical supportreducing the lifetime cost of ownership whileproviding long term security - for one-off engineeringspecials through to large volume, more standardrequirements.

To add value for each customer, a flexible responsiveapproach to meeting individual instrumentationrequirements has been put in place. Delta Controls'support infrastructure includes:


Delta Controls LtdRiverside Business Park, Dogflud Way, Farnham, GU9 7SS, UK

T +44 (0) 1252 729140 F +44 (0) 1252 729168 E [email protected]

Special Engineering


Delta Controls can also provide custom engineered





criteria.


About Delta Mobrey

Delta Mobrey, has built a global reputation over 65 years for its expertise in the design and manufacture of

reliable, high quality instrumentation for the power and process industries. Delta offers both customised

and standard solutions for process monitoring, alarm and shutdown applications, backed by local support

from a worldwide network of carefully selected, professional and fully trained representatives. Now with

a more comprehensive range of measurement techniques.

Quality is a cornerstone of the company’s success. This is recognised by industry and international approvals that

cover every aspect of Delta Mobrey's manufacturing, test and product portfolio.

Vertical Level Measurement

Chrisb

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instrumentation for nuclear applications

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